I apologize for any confusion. As an AI language model, I don’t have access to real-time information or property listings. I recommend contacting local real estate agents or using online real estate platforms to inquire about the availability of 300 sqm plots in Pocket 3C, Sector 18 of the Yamuna Expressway. They will be able to provide you with the most accurate and up-to-date information regarding the availability and pricing of plots in that specific area.